Die press



DIE PRESS 6 Sheets-Sheet 1 n van Z01:

O. J. GROEHN June 30, 1931.

DIE PRESS Filed June '17. 1929 6 Sheets-Sheet 2 J. GROEHN DIE PRESS Filed June 17, 1929 June 30, 1931.

6 Sheets-Shet 5 .4tarn qys.

sticking of the work to the punches or equivalent parts which might interfere with the return movement of any parts operating in lines transverse 01" at an angle to the lnes of action of the punches and consequent injury to the work.

The precise nature of the invention Will best be understood from the following description of certain forms 01 e1nbodiments thereof illustrated in the accoinpanyng drawings. It Will be recognized, however, that the particular constructions and applications of the invention described and shoxi*n have been chosen for purposes of exemplifi cation merely, and that the invention, as defined by the claims hereunto appended, may be otherwise emb0died without departure from the spirit and scope thereof.

In said drawings:

Fig. 1 is a side elevation, partly in section, of a portion of a press having the i1wention applied thereto, tl1e parts being shown in the positions assumed thereby at the cempletion of the operative streke of the ram.

Fig. 2 is a similar view illustrating tl1e adjustment of the adapter te cooperete with slightly different dies for 0perating upon work of a diferent shape.

Fig. 3 is a view similar to Fig. 1 showing the positions of the parts upon the completion of the retrtction of the ram.

Fig. 4 is a detail section taken substantially on the line 14, Fig. 8.

Figs. 5, 6 and 7 are vertical sectional views of one of the auxiliary pressure mechanisms, showing the parts in several different positions corresponding t0 different positions of the ram and also showing 21 slightly nodified 'c0nstruction.

Fig. 8 is a front elevation, partly in section on the line 88,- Fig. 9, of u press having applied thereto another form of the invention;

Fig. 9 is a plan view, partly in sectien en the line 9 9, Fig. 8, of the adapter mechanism shown in the latter figure.

Fig. 10 is a vertical section taken substantially on the line 10-10, of Fig. 9.

Fig. 11 is a front elevatien of a p0rtion of a press having a'pplied thereto another e1nbodi ment of the i11venti0n.

Figs. 12 and 13 are views similar to Fig. 11 illstrating 1urther modifications;

Referring' t0 Figs. 1 and 3, there is shown therein a conventional form of die press comprsing a suitable frame 20 supporting a bed 21 and in which is guided f0r reciprocm tion. tow1rd and from the bed 2, ram genelally indicated at 22. The dies en1ployed in the press will, of course, be chosen in accordance with the Werk to be turned out or the Operations te be performed, bui; as shown in Figs. 1 and 3 the parts are arranged t0 perform punching operations upon a piece of substanially senii-cylindric'al werk 23, and t0- this end the dies comprise a;

plurality 01": punches or gangs of punches 24;, 25 and 26, operaced as hereinafter de sc1ibed from the ram 22, and a cooperat ing punch die 27 shaped 00 conform to the work 23 and detachably mounted, as by bolts 28, en the bed 21. In the par ticular set-up shown the punches 25 are carried and directly operated by the primary mm 22, being 1novable thereby in the directi0n of m we1nent of said ram, While the punches 2 1 and 26, which require 1novements transverse 01 at an angle t0 the direction of movement of the prirnary ram 22, are operated by secondary rams 01' auxiliary pressure devices 29 operatively connected with the pri- 1nary ram 22 and adapted t0 convert a part of the pressure of said ran1 into pressures in the required directins. As shown in Figs. 1 and 3 tWo secondary ra1ns 29 are employed, said ran1s and the means f0r operating, guiding and operating the1n being substentially identical.

Each ram 0r pressure element 29 comprises a slide 1n0uned for longitudinal move- 1nent in the predetermined direction in a guide 30 comprising a channel having a closed enter end 31 and a defiachable cover plate 82. The guide 30 is pivotally mounted at 33 to a base plate 31 detachably secured, as by bolts 35, to the bed 21. The pivotal mounting of the guide 30 permits its outer end to be rased 0r lcwered, thereby varyng the direction or angle of action of the ram 29 with respect to the direction of movement of the ram 22, and consequently accommodating the mechanisrn te a wide "ariety of Werk. Fox example, in Figs. 1 and 3 each guide is shown With its outer end in an elevated position to provide or movement of each mm 29 in an inclined path in accordance with the requirements of the work for which the mechanism is shown in these figures as being set up, whereas in Fig. 2 the guides are shown as adjusted into a substantially horizontal position t0 adapt the mechanism to cooperate with a punch die 27 a of the form sh0wn te punch the Web ELI1C1 fianges of a channel member 28a. Any suiteble means may be provided for-securin-g the guides in adjusted position. As shown in Figs. 1 to 3 each guide is provided With a pair of clamping screws 36 Which cooperate with arcuate slots 37 in braclnts 38 rising from the base plate 34. H desired, an adjustable swinging strut 39, hinged to the base plate 81, may, in additien, be employed to brace the gnide 301 against the ac tion of the pressure applying mechanism.

Therain 29 is connected by a toggle with a fixed thrust bleek 10 secured, as by bolts 10a, to bhe inner face of the closed end 31. The tggle'co1nprises a pair of links 11 and 12 pivotally cenne cted Wi'0h cne another ae 13 to forma, knncle, the link 41 beng pivotally. conneetedjat 1 1 to the -ram29 end the link 42 rams r pressure members 69 and 70, the pressure members of each pair being movabie toward and from one an0ther in a pa=h substantially perpendicular to the path of movement of the members of the other pair and to tbe path of movement of the primary ram. 'rhe pressure members 69 comprise bars er piaes carried by slides 71 guided in ways 72 in ne plate 66 and connected by links 73 te oppositly extending arms 011 a rock shaft 7 1 journalled in brackes 7 secured e the underside of said plate 06. The rock shaft 7% is provided, beyond one edge of die piate 6G, with a third arm 7 6 ecnnect-ed by a iink 77 With a bracket 78 deachabiy -ecured, as by screws 79, to a primary ram 08. Tiie pressure members likewise comprise bars 01 p1ates each of Which is carried by a pair 0 slides 80 giiided in ways 1 in the p1ate G6. Corresponding slides 80 01 tbe severai pairs are connected by links 82 witb oppositely extending arms on rock shat-s 83 journaii-ed in brackets 84 secured to the 0p of the piate 66. Each rock shaft 83 is provided with a third arm 85 connected by a link 86 with a bracket 87 detachably secured, as by a bolt 88, with the primary ram 08.

From the 0regoing description, it will be seen that, when the primary ram 68 descends, the several pairs 01 secondary ranis Win be moved toward one another t0 exert pressure up0n interposed werk in two directions transverse to one another and 130 the direction of movement of the priniary ram, and hat when said primary ram rises, said secendary rams will be moved away from 0ne another t0 release the pressure, said secondary rams being positively actuated in b0th directi0ns.

In the form of die invention sh0wn in Fig. 11, die members 89 and 90 are carried respectively by the primary ram 91 and by secondary rams 92 guided f0r movement toward and from one another, in a direetion transverse to the direction of movement of the primary ram 91, in ways 93 in a p1ate 91 detachably secured, as by b0lts 95, to the bed 90. The die members 89 and 90 cooperate with a die member 97 detachably secured, as by bolts 970, to the p1ate 94. Each of the secondary rams 92 is operated by a pair of togg1es comprising links 98 and levers 99, the latter being piv0ced iniermediate their ends to brackets 100. The brackets 100 are detachably secured, as by beits 101, to the press frame uprights 102 in which he primary ram is guided. The levers 99 of each pair are connected by a link 103 with a bracket 104 de tachably secured, as by a bolt 105, to nhe primary ram 91. in this form of the invention, i Wii1 be seen hat, as in the forms previously described, a porion of flie downward pressure of he primary ram 91 Wi11 be converted int0 pressures tbrough the secondary rams 92 and diemembers 90 in a direction transerse te the direction of movement of said primary ram.

The form of the invention shown in Fig. 12 is sin iiar 170 that shown in Fig. 11, t-he secondary rams 92a being, however, provided wiih inclined suraces 106 whieh cooperate With wedges 107 depending r0m anc1deachabiy secured to the primary ram 91a, as by beits 108. 111 this construction the sec- 0idary ra1ns 92a are positively actuated t0- werd one an0-her by the wedges 107 when the primary ramdescends, bui; are moved away 0111 0n.e another by springs 109 housed in snitabie recesses in he sugporting plate91a.

In Fig. 13 is shown a modification of the mecbanism iast described adapted t0 operate simnltaneonsiy upon 13W0 pieces of work 23?) and 230 suppored bydie members 270 and 270 mounted on the supporting plate 940. In this form 0 he invention the secondziry rams 920 and 920 are, upon the descent of the primary ram 91), m0ved away from one another and toward the die members 27 0 and 270, respectively,by a double wedge member 1070 detachably secured o the primary ram and cooperaing Wiih wedge surfaces 1060 and 1060 011 said sec ondary rarns respectively. The operation of thisferm 01 the irwention will be obvious from i;he preceding descrip ti0n.

Haring tbus described my invention, I claim:

1. The combinaien with a press having a reeiprocating ram, of dies having relatively m0vable eoperatingr Inembers, and mechanism associated with said press :E0r converting at least a porti0n 01 the pressure of said ram info pressure throngh said dies in a dire ction transverse to the direction 0 mo einent of said ram, said mechanism having provision or varying the ang1e 0 said transverse pressure.

2. The combination with a press baving cooperating press eiements comprising a bed and a reciprocating ram, 0 dies detachably mounted in said press and having relatively movable coo erating members, and an adapter detachably mounted on one of said press e1e ments and detaehably connected with the other and with certain of said die members for converting at leasa a portion of the pressure of said ram into pressure through said dies in 

